<p>➀ Astronomers have detected the lowest-mass dark object ever found in the universe, a mysterious object with a mass of roughly one million times that of our Sun, located approximately 10 billion light-years from Earth.</p><p>➁ The discovery challenges the widely-accepted Cold Dark Matter (CDM) theory, which predicts that dark matter forms clumps or halos across a vast range of sizes.</p><p>➂ The object's true nature remains unknown, with two leading possibilities: a clump of dark matter or a very compact, inactive dwarf galaxy.</p>